[01] Hafeezul Haq, Department of Electrical & Electronics Engineering, Karadeniz Technical University, Trabzon, Turkey. [02] Mehedi Hasan Imran, Department of Electrical & Electronics Engineering, Karadeniz Technical University, Trabzon, Turkey. [03] Halil Ibrahim Okumus, Department of Electrical & Electronics Engineering, Karadeniz Technical University, Trabzon, Turkey. [04] Zia-ul-Haq , Department of Electrical Engineering, University of Engineering & Technology, Peshawar, Pakistan.

DTC is a control technique in AC drive systems to obtain high performance torque control. The conventional DTC drive uses a pair of hysteresis comparators. Those DTC drives suffer from high torque ripple and variable switching frequency. The most common and easy solution to those problems is the use of space vector depends on the reference torque and flux. This paper proposes design and simulation of a direct torque controlled induction motor drive system based on Space vector modulation and PI controller to control speed, torque and to reduce torque ripples. For controlling these the principle used here is the simultaneously decoupling of the stator flux and electromagnetic torque. Hysteresis comparators used by DTC drives suffer from high torque ripple and variable switching frequency. The proposed SVM based DTC technique reduces torque ripples and preserve DTC transient merits such as fast torque response. The basis of the SVM-DTC method is the calculation of the required space vector of voltage to compensate the errors in flux and torque and its generation using the SVM for each sample period. The performance of this method in this paper is demonstrated by simulation using Simulink software.

Direct Torque Control, Induction Motor, PI Controller, Space Vector Modulation

[01] Cristian Lascu, Ion Boldea, Fellow, IEEE, and Frede Blaabjerg, Senior Member, IEEE ‘A Modified Direct Torque Control for Induction Motor Sensorless Drive’ IEEE Transactions on Industry Applications, Vol. 36, No. 1, Jan/ Feb 2000. [02] M. Zelechowski, M. P. Kazmierkowski and F. Blaabjerg ‘Controller Design for Direct Torque Controlled Space Vector Modulated (DTC-SVM) Induction Motor Drives’ IEEE ISIE 2005, June 20-23, 2005. [03] Ameni Ouarda and Fatma Ben Salem ‘Induction Machine DTC-SVM: A Comparison Between Two Approaches’ 2013 10th International Multi-Conference on Systems, Signals & Devices (SSD) Hammamet, Tunisia, March 18-21, 2013. [04] Fatma Ben Salem and Nabil Derbel ‘Direct Torque Control of Induction Motors Based on Discrete Space Vector Modulation Using Adaptive Sliding Mode Control’ Taylor & Francis Group, LLC, Electric Power Components and Systems, ISSN: 1532-5008 print / 1532-5016 online, 42: 1598–1610, 2014. [05] Arpit S. Bhugul, Dr. Archana G. Thosar ‘Simulation of Direct Torque Control of Induction motor using Space Vector Modulation Methodology’ International journal of Modern Engineering Research (IJMER), ISSN: 2249–6645, Vol. 4, Iss. 5, May. 2014. [06] Anjana Manuel, Jebin Francis ‘Simulation of Direct Torque Controlled Induction Motor Drive by using Space Vector Pulse Width Modulation for Torque Ripple Reduction’ International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering, Vol. 2, Issue 9, September 2013. [07] Hassan Farhan Rashag, ‘DTC-SVM Based on PI Torque and PI Flux Controllers to Achieve High Performance of Induction Motor’ Research Journal of Applied Sciences, Engineering and Technology 7(4): 875-891, 2014. [08] ‘Direct Torque control and Space vector modulation’, http://www.en.wikipedia.org, access: 29 May 2015. [09] Peter Vas, “Sensorless Vector and Direct Torque Control” (Oxford Science Publications). [10] Jose L. Azcue P. and Ernesto Ruppert “Three-phase Induction Motor DTC-SVM Scheme with Self-Tuning PI-Type Fuzzy Controller” Seventh International Conference on Fuzzy Systems and Knowledge Discovery (FSKD 10-12 Aug. 2010), IEEE. [11] Abhijit A. Gade, Dr. Kailash J. Karande, Amol B. Jagadale “Space Vector Modulation Based Feed Control Using Three Phase Induction Motor” International Journal of Modern Trends in Engineering and Research, e-ISSN No.: 2349-9745, Date: 2-4 July, 2015. [12] T.Sravani, S. Sridhar “SVM-DTC of an Induction motor based on voltage and stator flux angle using fuzzy logic controller” International Research Journal of Engineering and Technology (IRJET) Volume: 02 Issue: 04 July-2015. [13] Dr. E. V. C. Sekhara Rao “Space Vector Modulated Direct Torque Control of IPMSM Drive” International Advanced Research Journal in Science, Engineering and Technology Vol. 2, Issue 8, August 2015.